Topology optimization for enhancing the acoustical and thermal characteristics of acoustic devices simultaneously

Oh, Kee Seung; Lee, Jin Woo

doi:10.1016/j.jsv.2017.04.027

Cited by 23 publications

(10 citation statements)

References 34 publications

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“…Therefore, the temperature distribution must be accurately determined by heat transfer analysis before an acoustical analysis can be conducted for the muffler. 34 In addition, the material properties (B steel , ρ steel , and k steel ) of 409 stainless steel also change with temperature as expressed in equations ( 15)- (17), which are only valid in the temperature range from 200 K to 1600 K 41 : B steel , ρ steel , and k steel represent the bulk modulus, density, and thermal conductivity for 409 stainless steel, respectively. The thermal conductivity of air changes with temperature as expressed in equation ( 18)…”

Section: Interaction Between the Three Physicsmentioning

confidence: 99%

“…The functions are called interpolation functions, and their effectiveness in acoustical, thermal, and flow TO problems have been sufficiently validated in previous studies. [12][13][14][15][16]29,30,[32][33][34] The density ð ρ r Þ and bulk modulus ðB r Þ of the r-th finite element in the design domain for the Helmholtz equation are determined by the interpolation functions given as equation ( 20)…”

Section: Density-based Tomentioning

confidence: 99%

“…Therefore, the temperature distribution must be accurately determined by heat transfer analysis before an acoustical analysis can be conducted for the muffler. 34…”

Section: Three Physics For Muffler Analysis and Designmentioning

confidence: 99%

“…Lee and Jang 32,33 optimized the internal partition layout of a muffler using flow and acoustical TO methods to improve both the pressure drop and noise attenuation performance. Oh and Lee 34 performed TO to obtain an optimal muffler considering acoustical and heat transfer phenomena. In addition, thermo-acoustics studies were carried out to investigate the acoustical damping effect due to the small and narrow zones in the Helmholtz resonator.…”

Section: Introductionmentioning

confidence: 99%

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Partition layout inside a muffler integrated with a thermoelectric generator: Multi-physics analysis and optimal design

Lee

2022

Journal of Low Frequency Noise, Vibration and Active Control

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A multi-physics-analysis-based topology optimization (TO) method is proposed to optimally design the internal partition layout of a muffler integrated with a thermoelectric generator (TEG). The basic equations governing the acoustical behavior, heat transfer, and fluid flow in the muffler are introduced, and their interaction is designated for exact numerical analysis in terms of acoustics, heat transfer, and fluid mechanics. To implement density-based TO, one design variable is assigned to each finite element in the design domain, and interpolation functions suitable for each physics phenomenon are employed. In the TO problem formulation, the sum of the squared acoustic pressures at the outlet of the muffler for multi-target frequencies is selected as an objective function to achieve broadband noise attenuation. The temperature of the TEG and the pressure drop are constrained for high energy recovery efficiency and fluid passage, respectively. The optimization problem formulated for the muffler design is solved for various design conditions. Optimal partition layouts are obtained depending on the location and length of the TEG, the upper limit value of the pressure drop, and the number of target frequencies in the same frequency band. The noise attenuation performances of each partition layout are compared, and their expected recovery energies are calculated. One optimal partition layout is discussed in terms of acoustics, heat transfer, and fluid mechanics. The numerical results strongly support the validity of our proposed method for the optimal design of a muffler integrated with a TEG.

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Section: Interaction Between the Three Physicsmentioning

confidence: 99%

Section: Density-based Tomentioning

confidence: 99%

“…Therefore, the temperature distribution must be accurately determined by heat transfer analysis before an acoustical analysis can be conducted for the muffler. 34…”

Section: Three Physics For Muffler Analysis and Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Partition layout inside a muffler integrated with a thermoelectric generator: Multi-physics analysis and optimal design

Lee

2022

Journal of Low Frequency Noise, Vibration and Active Control

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“…Structural topology optimization is an effective optimization method to find optimal distribution of structural materials by considering constraints, loads, and optimization objectives. 3,4 In recent decades, topology optimization theory has been widely studied in the area of conceptual design of industrial products, and some general practical topology optimization methods have been presented. In automobile industry and aircraft industry, topology optimization techniques are used for saving material to improve dynamic behavior of structure.…”

Section: Introductionmentioning

confidence: 99%

Topology optimization of transmission gearbox under multiple working loads

Liang

Liu³

et al. 2018

Advances in Mechanical Engineering

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This article is concerned with topology optimization of transmission gearbox under multiple working loads by taking dynamic performance as research object. First, the dynamic excitation model and finite element model are established, the vibration responses of the key points on gearbox are obtained by applying dynamic excitation on finite element model based on modal dynamic method, and the simulation responses are compared with testing results to validate finite element model. Finally, the gearbox structure is optimized by utilizing topology optimization method, and the lightweight model of transmission gearbox structure is redesigned. The dynamic performance indexes such as natural frequency are improved obviously, which indicates that the topology optimization method is very effective in optimizing dynamic performance of complex gearbox structure. The research has an important theoretical significance and reference value for lightweight design of transmission gearbox structure.

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Evolutionary topology optimization approach to design multiphase soundproof systems with poroelastic media

Pereira,

Anaya‐Jaimes,

Pavanello

2024

Numerical Meth Engineering

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SummaryWith the constant development of cities, noise sources have become increasingly present inside and outside living environments. Consequently, soundproof systems comprised of porous materials have been widely adopted as filling fabric of closed‐space structures, such as in the components of buildings, airplanes or automobiles. However, in many situations, simply filling spaces may not be the most effective approach. In that scenario, this work introduces a multiphase acoustic topology optimization methodology to design closed‐space structures for sound attenuation. Based on the Bi‐directional Evolutionary Structural Optimization (BESO) algorithm, the proposed approach combines Biot's poroelasticity equations, expressed in the mixed /p form, and the Unified Multiphase (UMP) technique to fully describe the multiphysics involved in the acoustic, poroelastic and elastic model relations. An objective function contemplating different combinations of structural, viscous and thermal dissipated powers is maximized over multiple frequencies. Volume constraints in each material phase and a novel material interpolation scheme are also considered. The resultant topologies present enhanced dissipated power levels and manufacturability, even when compared with various baseline configurations of similar volume fractions.

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Topology optimization for enhancing the acoustical and thermal characteristics of acoustic devices simultaneously

Cited by 23 publications

References 34 publications

Partition layout inside a muffler integrated with a thermoelectric generator: Multi-physics analysis and optimal design

Partition layout inside a muffler integrated with a thermoelectric generator: Multi-physics analysis and optimal design

Topology optimization of transmission gearbox under multiple working loads

Evolutionary topology optimization approach to design multiphase soundproof systems with poroelastic media

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